What allows running discounted EC2 instances when unused capacity is available?1 pointReserved instancesSpot instancesDedicated hostsLambda functions

A research group wants to provision an Amazon EC2 instance for a flexible application that can be interrupted. As a Cloud Practitioner, which option would you recommend as the MOST cost-optimal option?Question 42Answera.Dedicated Hostb.On-Demand Instancec.Spot Instanced.Reserved Instance (RI)

Which pricing model in AWS is best suited for workloads with predictable usage?a)On-Demand Instancesb)Reserved Instancesc)Spot Instancesd)None of the mentioned

How are unused Reserved Instances handled in an AWS Organization?a)They are automatically transferred to other member accountsb)They can be exchanged for different types or sizes of Reserved Instancesc)They are applied to the payer account's EC2 usaged)They can be sold on the AWS Marketplace to other AWS customers

What are sustained use discounts?Per-second billing that starts after a 1 minute minimumPurchase commitments for specific resources you know you will useDiscounts you receive by using preemptible VM instancesAutomatic discounts that you get for running specific Compute Engine resources for a significant portion of the billing month

For a company using reserved EC2 instances across multiple units, what is the most cost-optimal solution to manage under-utilization and increased demand?